it's already 39 in concord. 40degrees in napa. it is very cold throughout the bay area. but the north bay is the focus tonight because temperatures there could easily get into the upper 20s. for the rest of us a freeze warning will go into effect tonight and tomorrow morning. it's going to be real cold tonight. coming up, we're going to talk more about the freeze warning going on. the coldest day we're going to see and believe it or not there's a chance for showers in the forecast. >>> now to ktvu's ken wayne live in santa rosa on what's just the beginning of a cold blast of winter like weather, ken. >> reporter: it's 43 degrees right now in santa rosa and it's going to get much colder than that. if you have to be outside one good place to be is next to a warm fire. >> it's actually refreshing. it gets you into the hole day season feel of everything. >> i'm definitely sleeping in my scarf and mittens to save on pg & e. >> reporter: colder than tonight's lows in chicago and detroit. >> reporter: a few days back we had it for a couple of days and it wreaked havoc. it broke